Terminal apparatus for transmitting or receiving a signal including predetermined information

Abstract

A reception unit periodically receives a packet signal from a base station apparatus in each of two or more subframes in a superframe formed by time-multiplexing the subframes. An analysis unit gives a priority order to a subframe receiving the packet signal from the base station apparatus based on the packet signal received in the reception unit. A processing unit preferentially processes the packet signal received in the subframe with a high priority order among the priority orders given in the analysis unit.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a communication technique, and particularly to a terminal apparatus for exchanging a signal containing predetermined information.[0003]2. Description of the Related Art[0004]There is discussed a drive assist system for providing road information or intersection information via road-to-vehicle communication in order to prevent collision accidents at the intersections or to reduce traffic jams, or mutually providing vehicle drive information via inter-vehicle communication. With the road-to-vehicle communication, information on the situations of the intersections is communicated between a roadside apparatus and a vehicle-mounted apparatus. With the road-to-vehicle communication, the roadside apparatuses need to be installed on the intersections or on the roads, and thus time and cost therefor increase. To the contrary, with the inter-vehicle communication, or in a form in which information...

AI Technical Summary

Benefits of technology

The patent text explains a way to verify electronic signatures in a way that reduces processing loads. Electronic signatures using ECDSA can increase processing loads if all the signals in a network are verified. The text suggests skipping the verification of electronic signatures in certain packets to reduce processing loads. This results in a thinner processing process.

Problems solved by technology

With the road-to-vehicle communication, the roadside apparatuses need to be installed on the intersections or on the roads, and thus time and cost therefor increase.

Communication is more easily intercepted with wireless communication than with wired communication, and thus confidential communication contents are difficult to secure.

When a apparatus is controlled via a network, a spoofing third party can operate it via illegal communication.

However, at the intersections, an increase in vehicles or an increase in terminal apparatuses causes an increase in traffics, and thus an increase in collisions of packet signals is expected.

Consequently, data contained in the packet signal cannot be sent to other terminal apparatus.

If the state occurs in the inter-vehicle communication, the purpose to prevent collision accidents at the intersections cannot be achieved.

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